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Genesis of Neogene Formation Waters in the Central Qaidam Basin:Clues from Hydrochemistry and Stable D-O-S-Sr Isotopes

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Acta Geologica Sinica(English Edition) 2023年第6期97卷 1801-1813页

作者： HAN Guang PAN Tong LI Qingkuan FAN Qishun HU Yan LIU Jiubo ZHANG Xiying key laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China qinghai Provincial key laboratory of Geology and Environment of Salt Lakes Xining 810008China qinghai Provincial key laboratory of Exploration Research of Salt Lake Resources in Qaidam Basin Qinghai Qaidam Integrated Institute of Geology and Mineral Resource ExplorationGolmudQinghai 816099China University of Chinese Academy of Sciences Beijing 100049China Bureau of Geological Exploration&Development of qinghai province Xining 810008China

Geological explorations have revealed plentiful Neogene formation waters in anticlines in the central Qaidam Basin(QB).However,the hydrochemistry and origin of these waters are *** this study,the hydrochemistry and DO-S-Sr isotopes of these formation waters were determined to study their origin and *** formation waters are enriched in Na-Ca-Cl,and depleted in Mg-K-SO4-HCO3ions with elevated Li-B-Br-Sr *** D-O isotopes prove that the formation waters originated from weak-evaporated meteoric waters,and experienced water-rock *** comparisons and Caexcess-Nadeficitdiagrams suggest that solute sources of these waters include evaporite dissolution,waterrock interaction,and minor residual lake *** sulfate reduction and water-rock interactions are supported by the high S-Sr *** enriched Li-B-Br-Sr concentrations of these waters are in accord with the high geochemical background values of the *** the genesis of the formation waters,it can be concluded that meteoric waters from the southern Kunlun Mountains were discharged into the basin,weakly evaporated,and then infiltrated into the Neogene strata through faults leaching the soluble ions and mixing with residual lake brines,and all experienced water-rock interactions and a sulphate reduction process.

关键词： hydrochemistry brine resources lake/meteoric waters D-O-S-Sr isotopes Miocene-Pliocene Qaidam Basin

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Analysis of coordinate time series of DORIS stations on Eurasian plate and the plate motion based on SSA and FFT

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Geodesy and Geodynamics 2023年第1期14卷 90-97页

作者： Qiaoli Kong Linggang Zhang Jingwei Han Changsong Li Wenhao Fang Tianfa Wang College of Geodesy and geomatics Shandong University of Science and TechnologyQingdao 266590China State key laboratory of Mining Disaster Prevention and Control Co-founded by Shandong province and Ministry of Science and technology Shandong University of Science and TechnologyQingdao 266590China

This study focuses on analyzing the time series of DORIS beacon stations and plate motion of the Eurasian plate by applying Singular Spectrum Analysis(SSA)and Fast Fourier Transform(FFT).First,the rend terms and periodic signals are accurately separated by SSA,then,the periodic seasonal signals are detected using SSA,and finally,the main components of the time series are reconstructed *** test results show that the nonlinear trends and seasonal signals of DORIS stations are detected *** periods of the seasonal signals detected are year,half-year,and 59 days,*** contribution rates and slopes in E,N,and U directions of the trend items of each beacon station after reconstruction are obtained by least-square *** velocities of these stations are compared with those provided by the GEODVEL2010 model,and it is found that they are in good agreement except the DIOB,MANB,and PDMB *** on the DORIS coordinate time series,the velocity field on the Eurasian plate is constructed,and the test shows that the Eurasian plate moves eastward as a whole with an average velocity of 24.19±0.11 mm/y in the horizontal direction,and the average velocity of it is1.74±0.07 mm/y in the vertical direction.

关键词： DORIS SSA FFT Coordinate time series Plate motion

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Polar motion prediction using the combination of SSA and ARMA

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Geodesy and Geodynamics 2023年第4期14卷 368-376页

作者： Qiaoli Kong Jingwei Han Xin Jin Changsong Li Tianfa Wang Qi Bai Yanfei Chen College of Geodesy and geomatics Shandong University of Science and TechnologyQingdao 266590China State key laboratory of Mining Disaster Prevention and Control Co-founded by Shandong province and Ministry of Science and technology Shandong University of Science and TechnologyQingdao 266590China

High-precision polar motion(PM) prediction is of important significance in astronomy, geodesy, aviation,hydrographic mapping, interstellar navigation, and so on. SSA can effectively extract the trend and period terms of PM,in the process of achieving high-precision medium-and long-term polar motion prediction,it is necessary to solve the end effect problem and overfitting problem of SSA forecasting method;therefore, ARMA was applied to decreasethe end effect, and a suitable combination of reconstructed components was determined to avoid the high variance reaction of SSA overfitting. Based on the decomposition and reconstruction of the PM by SSA, the reconstructed components are determined to participate in the SSA iterative fitting model according to the variance contribution rate. The combination of the reconstructed components representing the polar motion period term and the trend term is determined according to the correlation analysis of the selected reconstructed components. After the above work, the principal component prediction sequence is obtained by fitting the period term and the trend term to convergence, respectively, and then, the SSA end effect is modified, and the residual term is predicted based on ARMA. The test results show that he prediction accuracy of SSA + ARMA at the front of the X and Y directions are improved by 96.90% and 97.53% compared with those of SSA, respectively,and the forecast accuracy of 365 days are improved by 37.93% and 19.53% in the X and Y directions compared with those of Bulletin A, respectively.

关键词： Polar motion prediction SSA ARMA End effect

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Characterization of the Flexural Behavior of Bamboo Beams

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Journal of Renewable Materials 2021年第9期9卷 1571-1597页

作者： Limin Tian Jianpeng Wei Jiping Hao Qiushuo Wang School of Civil Engineering Shaanxi Key Laboratory of Structure and Earthquake ResistanceXi’an University of Architecture and TechnologyXi’an710055China The key laboratory of Plateau Building and Eco-Community in qinghai Qinghai Building and Materials Research Co.Ltd.Xining810008China Anhui province key laboratory of Green Building and Assembly Construction Anhui Institute of Building Research&DesignHefei230031China

Bamboo is a renewable and environmentally friendly material often used for *** study investigates the flexural behavior of bamboo beams through theoretical and finite element(FE)*** the material’s nonlinearity,a method of calculating load-deflection curves is proposed and validated via FE *** interfacial slippage dominated by the shear stiffness of the interface between two bamboo poles significantly influences the flexural behavior of double-pole bamboo ***,the load-deflection curves for different shear stiffnesses can be obtained via theoretical and FE ***,a novel configuration using diagonal steel bands to avoid slippage is *** inclination angle of 45°is suggested to adequately develop the stiffness and bearing capacity of the steel band.

关键词： Bamboo beam flexural behavior interfacial slippage steel band FE analysis

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Vegetation Index Reconstruction and Linkage with Drought for the Source Region of the Yangtze River Based on Tree-ring Data

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Chinese Geographical Science 2021年第4期31卷 684-695页

作者： LI Jinjian WANG Shu QIN Ningsheng LIU Xisheng JIN Liya School of Atmospheric Sciences Plateau Atmosphere and Environment Key Laboratory of Sichuan ProvinceChengdu University of Information TechnologyChengdu 610225China Institute of Plateau Meteorology China Meteorological AdministrationChengdu/Heavy Rain and Drought-Flood Disasters in Plateau and BasinKey Laboratory of Sichuan ProvinceChengdu 610072China Hydrology and Water Resources Bureau of qinghai province Xining 810000China

Variations in vegetation are closely related to climate change, but understanding of their characteristics and causes remains limited. As a typical semi-humid and semi-arid cold plateau region, it is important to understand the knowledge of long term Normalized Difference Vegetation Index(NDVI) variations and find the potential causes in the source region of the Yangtze River. Based on four tree-ring width chronologies, the regional mean NDVI for July and August spanning the period 1665–2013 was reconstructed using a regression model, and it explained 43.9% of the total variance during the period 1981–2013. In decadal, the reconstructed NDVI showed eight growth stages(1754–1764, 1766–1783, 1794–1811, 1828–1838, 1843–1855, 1862–1873, 1897–1909, and 1932–1945)and four degradation stages(1679–1698, 1726–1753, 1910–1923, and 1988–2000). And based on wavelet analysis, significant cycles of2–3 yr and 3–8 yr were identified. In additional, there was a significant positive correlation between the NDVI and the Palmer Drought Severity Index(PDSI) during the past 349 yr, and they were mainly in phase. However, according to the results of correlation analysis between different grades of drought/wet and NDVI, there was significant asymmetry in extreme drought years and extreme wet years. In extreme drought years, NDVI was positively correlated with PDSI, and in extreme wet years they were negatively correlated.

关键词： Normalized Difference Vegetation Index(NDVI) reconstruction dendrochronology tree ring Source Region of the Yangtze River

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Allele-specific expression and alternative splicing in horse×donkey and cattle×yak hybrids

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Zoological Research 2019年第4期40卷 293-304页

作者： Yu Wang Shan Gao Yue Zhao Wei-Huang Chen Jun-Jie Shao Ni-Ni Wang Ming Li Guang-Xian Zhou Lei Wang Wen-Jing Shen Jing-Tao Xu Wei-Dong Deng Wen Wang Yu-Lin Chen Yu Jiang key laboratory of Animal Genetics Breeding and Reproduction of Shaanxi ProvinceCollege of Animal Science and TechnologyNorthwest A&F UniversityYangling Shaanxi 712100China Stake key laboratory of Plateau Ecology and Agriculture Qinghai Academy of Animal Science and Veterinary MedicineQinghai UniversityXining Qinghai 810016China State key laboratory of Genetic Resources and Evolution Kunming Institute of ZoologyChinese Academy of SciencesKunming Yunnan 650223China Faculty of Animal Science and technology Yunnan Agricultural UniversityKunming Yunnan 650223China

Divergence of gene expression and alter native splicing is a crucial driving force in the evolution of species;to date, however the molecular mechanism remains unclear. Hybrids of closely related species provide a suitable model to analyze allele-specific expressi on (ASE) and allele-specific alter native splicing (ASS). Analysis of ASE and ASS can uncover the differences in cis-regulatory elements between closely related species, while eliminating interferenee of trans-regulatory elements. Here, we provide a detailed characterization of ASE and ASS from 19 and 10 transcriptome datasets across five tissues from reciprocal-cross hybrids of horsex don key (mule/hi nny) and cattlexyak (dzo), respectively. Results showed that 4.8%-8.7% and 10.8%-16.7% of genes exhibited ASE and ASS, respectively. Notably, IncRNAs and pseudogenes were more likely to show ASE than protein-coding genes. In addition, genes showing ASE and ASS in mule/hinny were found to be involved in the regulation of muscle strength, whereas those of dzo were involved in high-altitude adaptati on. In con clusi on, our study dem on strated that explorati on of genes showing ASE and ASS in hybrids of closely related species is feasible for species evolution research.

关键词： Allele-specific alternative splicing Allele-specific expression Cis-regulatory elements Hybrid species

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Synthesis, Structure, and Luminescent Property of a 3-D Strontium Complex [Sr_3(pda)_2(Hpda)_2(H2O)_2]_n·2nH_2O

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Chinese Journal of Structural Chemistry 2014年第5期33卷 746-752页

作者：陈砚美高倩高丹丹王德荣李亚红刘玮李武 key laboratory of Organic Synthesis of Jiangsu province College of ChemistryChemical Engineering and Materials Science Soochow University key laboratory of Salt Lake Resources and Chemistry Qinghai Institute of Salt Lakes Chinese Academy of Sciences

The title complex [Sr3（pda）2（Hpda）2（H2O）2]n·2nH2O（H2pda = pyridine-2,6-dicar- boxylic acid） has been prepared under solvothermal conditions. It has been characterized by X-ray single-crystal diffraction, IR and elemental analysis. The crystal belongs to the monoclinic system, space group P21/c with a = 10.3795（8）, b = 9.2225（7）, c = 18.5726（14） , β = 104.377（2）o, V = 1722.2（2） 3, C28H22N4O20Sr3, Mr = 997.36, Z = 2, Dc = 1.923 g/cm3, μ = 4.722 mm-1, F（000） = 984, the final R = 0.0269 and wR = 0.0538. This complex possesses a 3-D structure which is constructed from 1-D chain motifs linked by carboxylate groups. The luminescent property of the title complex has been investigated.

关键词： strontium complex crystal structure luminescent property 3-D framework

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Height connection across sea by using satellite altimetry data sets,ellipsoidal heights,astrogeodetic deflections of the vertical,and an Earth Gravity Model

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Geodesy and Geodynamics 2023年第4期14卷 347-354页

作者： Jianbo Wang Xinmin Qi Kai Luo Zhengyuan Li Ruikang Zhou Jinyun Guo The School of Marine technology and geomatics Jiangsu Ocean UniversityLianyungang 222005China The key laboratory of Marine Environmental Survey technology and application Ministry of Natural ResourcesGuangzhou 510300China The South China Sea Marine Survey and technology Center State Oceanic AdministrationGuangzhou 510300China The College of Geodesy and geomatics Shandong University of Science and TechnologyQingdao 266590China

Islands and the mainland are separated by seas,and the distances between them might be so long that the height on the mainland cannot be exactly translated to the islands,resulting in different height systems on the mainland and the *** this study,we used astrogeodetic deflections of the vertical and ellipsoidal heights of points on the mainland and island near their coastlines to implement height connection across sea ***,the modeled gravity and modeled astrogeodetic vertical deflections of segmentation points along connecting routes over the sea between the mainland and the island were determined by Earth Gravity Model(EGM),and the ellipsoidal heights of segmentation points were determined by the satellite altimetry data ***,we used a linear interpolation model to increase the precision of the vertical deflections of segmentation ***,we computed the geopotential difference of points between the mainland and the island using a method derived from geopotential theory and the astronomical leveling ***,we estimated the normal height of the point on the island using the geopotential-difference iterative computation *** observed data of normal heights,ellipsoidal heights,and astrogeodetic vertical deflections referring to height sites in Qingdao,Shandong province,we conducted a numerical experiment involving the normal height connection across sea *** determined the data of the ellipsoidal heights and gravity of segmentation points along the connecting route across the water in the numerical experiment using *** distance of the height connection across the sea was approximately 10.5 *** to China's official leveling specifications,the experimental results met the criterion of third-class leveling precision.

关键词： Height datum connection across sea areas Geopotential difference Normal heights Astrogeodetic vertical deflections Islands

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Properties of L-band differential InSAR for monitoring mining-induced subsidence in coalfield of Jining, Northern China

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Journal of Central South University 2014年第4期21卷 1508-1517页

作者：陶秋香刘国林 geomatics College Shandong University of Science and Technology key laboratory of Surveying and Mapping technology on Island and Reef of National Administration of Surveying Mapping and Geoinformation

The properties and feasibility of L-band differential InSAR for detecting and monitoring mining-induced subsidence were systematically analyzed and demonstrated. The largest monitored subsidence gradient of 7.9×10-3 and magnitude of 91 cm were firstly derived by theoretical derivation. Then, the stronger phase maintaining capacity and weaker sensitivity to minor land subsidence compared with C-band DInSAR were illustrated by phase simulation of the actual mine subsidence. Finally, the data processing procedure of two-pass DInSAR was further refined to accurately observe subsidence of a coalfield of Jining in Northern China using 7 ALOS PALSAR images. The largest monitored subsidence magnitude of 39.22 cm and other properties were better investigated by testing results interpretation and subsidence analysis, and the absolute difference varying from 0.5 mm to 17.9 mm was obtained by comparison with leveling-measured subsidence. All of results show that L-band DInSAR technique can investigate the location, amount, area and other detailed subsidence information with relatively higher accuracy.

关键词： L-band differential InSAR ALOS PALSAR mine subsidence monitoring

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Fungal spore record of pastoralism on the NE qinghai-Tibetan Plateau since the middle Holocene

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Science China Earth Sciences 2021年第8期64卷 1318-1331页

作者： Haicheng WEI Chongyi E Ronglei DUAN Jing ZHANG Yongjuan SUN Guangliang HOU Jingyi GAO key laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China qinghai Provincial key laboratory of Geology and Environment of Salt Lakes Qinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China qinghai Provincial key laboratory of Physical Geography and Environmental Processes School of Geographic ScienceQinghai Normal UniversityXining 810008China Academy of Plateau Science and Sustainability Qinghai Normal UniversityXining 810008China

Pastoralism is considered a crucial factor in the eventual year-round occupation of high-altitude regions(>3000 m asl)of the qinghai-Tibetan Plateau,and the northeastern qinghai-Tibetan Plateau(NE-QTP)was an important corridor for early human *** analyzed fossil fungal spore records for the last 8500 years from a high resolution aeolian section at Langgeri(LGR)on the ***-two fungal spore types were identified in the LGR section,including seven coprophilous *** combined analysis of coprophilous fungal spores,Cyperaceae,Artemisia,and Hippophae pollen,and the charcoal>50µm fraction to explore the timing and controls of pastoralism on the NE-QTP since the middle *** commenced at LGR shortly before ca.5.5 ka and gradually increased between ca.5.5–3.5 ka,but markedly intensified after ca.2.2 ka,with three periods of growth at ca.2.1–1.9,1.4–1.2,and 0.6–0 ka,and a decline at ca.1.1–0.6 *** timing of changes in pastoral activity on the NE-QTP based on the coprophilous fungal spore record is supported by regional archeology and historical *** and political developments,rather than climate change,played key roles in the long-term fluctuations of regional pastoralism on the NE-QTP in the late Holocene.

关键词： Coprophilous fungal spores Pastoralism qinghai Lake basin Holocene qinghai-Tibetan Plateau

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